Objective: To observe influence of different risk factors on prognosis of patients with coronary heart disease (CHD) and normal myocardial perfusion imaging outcome.Methods: A total of 99 CHD patients with normal myocardial perfusion imaging outcome were selected.Left ventricular function indexes were measured by gated resting myocardial imaging in resting and stress state.All patients received telephone follow-up until natural death (died of other causes) or fatal or non-fatal heart attacks, or the termination of the experiment after 45 months.Cox proportion risk regression model was used to analyze risk factors of fatal and non-fatal heart attacks.Results: A total of 15 cases died during the 45-month follow-up.Mean all-cause mortality per year was 5.05%.Fatal heart attacks occurred in nine cases (9.09%), and non-fatal heart attacks occurred in 21 cases (21.21%).Cox proportion risk regression analysis indicated that smoking and left ventricular ejection fraction (LVEF) <50% were risk factors for fatal heart attacks (HR=4.887, 3.365, P=0.043, 0.002), while diabetes mellitus, dyslipidemia, smoking and LVEF<50% were risk factors for non-fatal heart attacks (HR=2.215~4.544, P<0.05 all).Conclusion: Incidence rate of cardiovascular events is higher in CHD patients with normal myocardial perfusion imaging.Smoking and impaired heart function suggest poor prognosis in these patients.

Objective To evaluate the feasibility,safety and efficacy of percutaneous transluminal stenting angioplasty for severe complicated stenosis of vertebrobasilar system. Methods From November 2003 to February 2006,5 candidates underwent percutaneous transluminal stenting for severe complicated stenosis of vertebrobasilar system. Results Four out of 5 candidates,had occlusion of unilateral vertebral artery (VA),1 had severe bilateral proximal segmental stenosis of VA. There were 4 with severe proximal segmental stenosis of the VA associated with multiple segmental stenosis of intracranial VA and basilar artery (BA),and 1 with multiple segmental severe stenosis of intracranial VA and BA. Stenosis rate ranges from 80% ～95% with involved length from 10-20 mm. Technical success was achieved in all of the patient (100%),and residual stenosis rate was less than 20%. All the symptoms due to vertebrobasilar blood supply insufficiency disappeared. Follow-up with DSA 6-12 months later demonstrated no restenosis; showing satisfactory short term efficacy. Conclusions Percutaneous transluminal stenting for vertebrobasilar blood supply insufficiency is a safe and efficacious option with favorable short term outcome,especially with furthermore prevention of stroke.

Objective:To observe the relationship between dynamic blood pressure variability (BPV) and left ventric‐ular diastolic function in patients with essential hypertension (EH) .Methods :A total of 140 newly diagnosed EH pa‐tients were selected .According to total coefficient of variation (CV) of 24h systolic blood pressure BPV ,they were divided into high CV group (n=70 ,CV>12.16% ) and low CV group (n=70 ,CV≤12.16% ) .Another 70 healthy subjects with corresponding gender and age were enrolled as healthy control group simultaneously .Echocardiography was used to measure mitral early diastolic peak flow velocity (E) ,late diastolic peak flow velocity (A) and decelera‐tion time of E peak (DT);meanwhile ,tissue Doppler mode was used to record early diastolic peak velocity (Em) and late diastolic peak velocity (Am) .All above indexes were compared among all groups .Results:Compared with healthy control group ,BPV significantly rose in EH patients (P<0.05 or < 0.01) .All BPV indexes in high CV group were significantly higher than those of low CV group except daytime mean diastolic blood pressure variability (dDBP‐BPV) and nighttime mean diastolic blood pressure variability (nDBP‐BPV) , P<0.05 all .Compared with healthy control group ,there were significant reductions in E and Em/Am ,and significant rise in DT and E/Em in EH patients ,P<0.05 or <0.01 ;compared with low CV group ,there was significant rise in E/Em [(10.32 ± 3.20) vs .(14.22 ± 2.20) ,P=0.033] in high CV group .Conclusion:Left ventricular diastolic dysfunction is more severe in hypertensive patients with higher dynamic blood pressure variability .

OBJECTIVETo study the effect of different water stress mode on photosynthesis characteristics of Aconitum barbaturnm, aimed at providing the theoretical basis for cultivating this kind of plant for the arid area.

METHODThe transplanted seedlings of A. barbatum were processed with fixed partial root zone drying(TI) ,alternate partial root zone drying(T2) and both partial root zone irrigation (T3) for three cycles,and relative parameters were measured.

RESULTThe net photosynthetic rate (Pn) in the treatment of T2 gradually increased and was higher than that in the treatment of T3 about 6.53%, mainly effected by non-stomatal factors. The water use efficiency (WUE) was higher than that in the treatments of T3 about 25.21%, while the transpiration rate (Tr) and the stomatal conductance was lower than those in the treatment of T1 and T3 separately. The maximum net photosynthesis rate (Pmax),the apparent quantum yield (AQY) and the dark respiration rate (Rd) were higher than those in comparison condition slightly.

CONCLUSIONThe alternate partial root zone drying is worth promoting vigorously, and it shall be a rational way to cultivate the A. barbatum under woodland.

Aconitum ; physiology ; Dehydration ; Photosynthesis ; physiology ; Plant Roots ; physiology ; Plant Stomata ; physiology ; Plant Transpiration ; physiology ; Seedlings ; physiology

Poly(diallyldimethylammonium chloride)(PDDA) was chosen to disperse multi-walled carbon nanotubes(MWCNTs) to prepare the stable PDDA-MWCNTs aqueous dispersion. Then, the positively charged PDDA-MWCNTs composite and negatively charged choline oxidase(ChOx) were employed to fabricate multilayer films on platinum(Pt) electrodes by layer-by-layer self-assembly technique, the anti-interferential film of Nafion was dropped at the end of the last multilayer films. The results showed that MWCNTs were evenly dispersed within the PDDA films and the multilayer films of (PDDA-MWCNTs)_n could improve the catalytic current response to choline significantly with the increased number of the multilayer films. The optimum assembly number was 6. The choline biosensor fabricated showed good linear correlation from 5×10~(-6)-2.5×10~(-4) mol/L with a detection limit of 2×10~(-6) mol/L(S/N=3), and the sensitivity was 21.97 mA/mol with a response time of 6.6 s, the RSD was less than 5%(n=3). Moreover, the biosensor exhibited an excellent anti-interferential property and a good stability.

Objective To investigate the effect and long-term prognosis of patients who underwent hepatectomy for hepatolithiasis. Methods We retrospectively analyzed the medical records of 98 patients with hepatolithiasis who were treated by hepatectomy in Peking Union Medical College Hospital.Results Male/femah:1/1.7;median age:55 years old.58 cases(59.2%)had been treated before;among them.50 by surgery.In 88 cages(89.8%)hepatolithiasis involved the left lobe only,in 2(2.0%) only the right lobe involved.and in 8(8.2%)both left and right lobe were involved.51(52.0%)had extrahepatic biliary stones,30(30.6%)had biliary duct strictures,28(28.6%)had a history of biliary ascariasis.and 5(5.1%)had a concurrent biliary tract malignancy.All received partial hepatectomy according to the stone location;for the 8 bilaterally involved patients,left hepatectomy and right lithotomy were performed.Postoperative complications occurredin 14 cases(14.3%),and there were2perioperative deaths(2.0%).Seventy-eight patients(79.6%)have beenfollowedupfor over1 yearwith no tumors;the results were excellent or good in 91.0%;the stone residue and recurrence rate were both 2.0%.Conclusions Hepatectomy not only eliminates calcuci,but also removes diseased biliary tracts,with advantages of low residue stone and recurrence rate.

Objective To investigate the role of hMSH2 in the pathogenesis of sporadic insulinomas and to determine whether the expression of hMSH2 could be used to differentiate benign sporadic insulinomas from malignant ones. Methods Fifty-five sporadic insulinomas (40 benign and 15 malignant tumors) resected from 50 patients were obtained. Expression of hMSH2 was detected by immunohistochemistry staining. DNA was obtained from micradissected tissue. Loss of heterozygnsity (LOH) of hMSH2 gene was detected by PCR-LOH. 6 microsatellite markers were selected on 3 chromosomes, and microsatellite instability (MSI) status of tumor tissue were detected by PCR. The findings were analyzed in relation to the clinicopathological characteristics. Results Down-regulation of hMSH2 expression was found in 13% of 55 sporadic insulinomas. LOH of the hMSH2 gene was not present in 55 insulinomas. High frequency MSI (MSI-H, MSI occurred in at least 2 out of 6 sites) was present in 36% (20/55) of all the insulinomas. Down-regulation of hMSH2 expression was found in 33% of the 15 malignant tumors, while it was 5% in benign tumors (P < 0. 05). Conclusions Down-regulation of mismatch repair gene hMSH2 may be correlated with the degree of tumor malignancy. The expression of hMSH2 could be used as a potential marker for distinguishing benign insulinoma from malignant ones.

OBJECTIVE: To report the experience with canalplasty during the operation of overlay tympanoplasty. METHOD: A retrospective review was performed on 56 patients (59 ears) that underwent tympanoplasty and canalplasty (part with intact canal wall mastoidectomy). Transcanal and postauricular incisions were made, and the posterior canal skin flap was elevated and fixed with retractor, while the anterior flap was freed. A drill was used to remove the anterior and inferior bone bulges and the adjacent bone to expose the tympanic sulcus and annulus adequately, and the epithelium of tympanic membrane remnant was removed thoroughly. After the eradication of the middle ear disease, temporal fascia was used as an overlay graft and the canal skin was replaced, and the gel-foam soaked in antibiotic and Dexamethasone solution was used to compress the canal. The patients began to use ear drops 1 week after surgery, and the gelfoam in canal lasted for 4-6 weeks. RESULT: Follow-up was conducted for 0.5-3.5 years respectively, all patients gained stage I incision cure, the external auditory canal was wide and tympanic membrane gained a good shape, the complications of skin flap necrosis, external canal stenosis and cholesteatoma pearl were not occurred. CONCLUSION Canalplasty was the necessary procedure in the operation of overlay tympanoplasty which could conduce to de-epithelization of the membrane, placement of fascia and prevention of the occurrence of cholesteatoma pearl.
Adolescent ; Adult ; Aged ; Child ; Cholesteatoma, Middle Ear ; surgery ; Ear Canal ; surgery ; Ear, External ; surgery ; Ear, Middle ; surgery ; Fascia ; transplantation ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Surgical Flaps ; Treatment Outcome ; Tympanoplasty ; methods ; Young Adult

Allergic asthma is a complex，polygenic disease characterized by chronic inflammation and airway hyperresponsiveness. Fungus and dust mites are the most important inhaled allergens of allergic asthma，and often exist in the form of mixed allergens. In recent years，genetic studies have shown that several genes are associated with allergic asthma attacks. This article reviews the studies on the genes related to allergic asthma caused by dust mites and fungus，such as a disintegrin and metalloproteinase 33（ADAM33），interleukin-4（IL-4），glycoprotein A repetitions predominant（GARP），toll like receptor 3（TLR3），mannose-binding lectin 2（MBL2），chemokine（C-C motif）ligand 17（CCL17）and other genes .

Objective:To investigate the prognostic value of colony forming unit-granulocyte and macrophage (CFU-GM) in allogeneic hematopoietic stem cell transplantation (allo-HSCT).Methods:Seventy-three patients who received allo-HSCT in Hebei Yanda Lu Daopei Hospital from February 2015 to January 2017 were selected. According to the level of CFU-GM from bone marrow (BM) culture at the time of allo-HSCT, the patients were fit into high CFU-GM group and low CFU-GM group. The overall survival rate (OS) and relapse-free mortality rate (NRM) of patients after transplantation were tested by χ2 test after a follow-up of 37.0 (12.5, 50.5) months. Kaplan-Meier method was used to compare OS and event-free survival (EFS) of patients with different CFU-GM levels. Logistic regression model was used to analyze the prognostic factors. Cox regression model was used to further analyze the prognostic risk of patients.Results:Compared with the low CFU-GM group, the high CFU-GM group had a higher OS (81.40% vs 60.00%, χ2=4.067, P=0.044) and a lower NRM (11.63% vs 36.67%, χ2=6.474, P=0.011). Compared with the low CFU-GM group, the mean OS time (57.6 and 37.1 months, respectively, P=0.039) and the mean EFS time (61.7 and 38.5 months, respectively, P=0.011) were significantly higher in the high CFU-GM group. Logistic regression analysis showed that both the level of CFU-GM and BM MNC were significant influencing factors of OS ( OR=2.917, 95% CI 1.011-8.418, P=0.048 and OR=1.510, 95% CI 1.058-2.154, P=0.023, respectively) and EFS ( OR=4.400, 95% CI 1.336-14.492, P=0.015 and OR=1.447, 95% CI 1.002-2.090, P=0.049, respectively)after transplantation. The level of CFU-GM was an independent risk factor for evaluating EFS ( HR=0.279, 95% CI 0.097-0.805, P=0.018). BM MNC was an independent risk factor for OS ( HR=1.345, 95% CI 1.052-1.720, P=0.018). Conclusion:The level of CFU-GM and BM MNC were related to the prognosis of allo-HSCT. The patients in the high CFU-GM group had higher EFS.